Pierre Koch (18 September 1895 – 14 February 1978)[1] was a French civil engineer, director of Water and Sanitation in Paris, and Professor of Hydrology at the École des ponts ParisTech.

[1] In 1950 he was also appointed Professor of Hydrology at the École des ponts ParisTech, where he taught until his retirement in the 1960s.

[1] In 1987 the International Association on Water Pollution Research and Control (IAWPRC) initiated the Karl Imhoff-Pierre Koch Medal, in honour of two of their foremost honorary members.

Hager (2014) summarized: In 1964-65 Koch participated in a meeting with several other European engineers to discuss new tools, such as the critical path method.

Among the participants were Arnold Kaufmann and Yves Eugene, who chaired the meeting, both also from France, Dick Vullinghs from The Netherlands, and Roland Gutsch from Germany.